This is the 8371st most frequent Russian word.
мороз
Frost or intense cold.
In this sentence, 'мороз' is used as a noun to describe very cold weather or frost, emphasizing the environmental conditions.
На улице сильный мороз, и деревья покрылись инеем.
There is a severe frost outside, and the trees are covered with hoarfrost.
Here, 'мороз' refers to the natural phenomenon causing patterns on surfaces due to below-freezing temperatures.
От мороза на окнах появились красивые узоры.
Frost caused beautiful patterns to form on the windows.
In this example, 'мороз' is described as a physical phenomenon from which one might need protection, relating to freezing temperatures.